Rock-drill.



W. A. SMHH.

ROCK DRILL.

APPLICATION HLED JAN.5.1917.

W. A. SII/HTH.

ROCK DRILL.

APPLICATION FILED IAN. 5I I9I7- l@ Mmm Jan. 15., ww. Y

2 SHEETS-SHEET 2.

WILLIAM A. SMITH, 0F DENVER, COLORADO,

ASSIGNOR TO THE DENVER. ROCK MRILL MANUFACTURING COMPANY, A CORPORATION' OF DELAWARE.

ROCK-DRILL.

intenso. n

Specification of Letters Patent.

Patented dan. 15, 191.2..

Application filed January 5, 1917. Serial No. 140,793.

To aZZ whom it may concern:

'Be it known that 1, WILLIAM A. SMITH, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Rock-Drills, of which the following is a specification,

r1`he present invention relates more particularly to the means for directing cleansing fluid to the drill bit, and the object is to provide a novel arrangement of parts, whereby liquid and gaseous fluid can be delivered effectively.

A further object is to provide means that will take the gaseous fluid from the usual fluid operated feeding means and will prevent any bacliliow of liquid to said feeding means. 1 '1`he preferred embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal sectional view through a drilling apparatus, `and illustrating one embodiment `of the invention.

Fig. 2 is a view in elevation of the head block interposed between the drilling engine and the feeding means.

Fig. 3 is a sectional view substantially on the line 3 3 of Fig. 2.

Figs. d and 5 are sectional views on the lines 4 4 and 5 5 of Fig. 3.

Fig. 6 is a detail cross sectional view illus trating the control of the :fluid to the drilling motor.

Fig. 7 is a detail perspective view of the washer for the cleansing fluid directing tube, indicating the manner in which the same is applied to said tube.

Fig. 8 is a detail perspective view showing the washer in place on the tube. l

Similar reference numerals designate corresponding parts in all the figures of the drawings.

1n the embodiment illustrated, a drilling engine is provided,which includes a cylinder member 9 in which a reciprocatory hammer piston 10 is mounted, said hammer piston operating on a tappet 11 that is mounted in a head block 12 secured to the front end of the cylinder 9. The head block is provided with a suitable chuck 13 to receive a drill bit 14, and said bit is provided, as usual, with a bore 15 therethrough for conveying cleansing fluid to the bottom of the drill hole for the purpose of dislodging and blowing out the cuttings that would otherwise accumun late therein.

Mounted on the rear end of the drilling engine is motive fluid operated feeding means, comprising a cylinder 16 having a suitable piston 17 therein. This structure is well-known to the art, and is believed to need no detailed description. Interposed between the said feeding means and the drilling engine is a head block 18, this head block being cliambered, as shown at 19 to provide a lubricant reservoir and a web 20 extending across the reservoir and having a rearwardly open internally7 threaded socket 21 therein.

Motive fluid secured from any suitable source is admitted to the drilling engine Vthrough a throttle valve 22 journaled in a casing 23 formed upon one side of the head block 18, the throttle valve 22 having a central bore 24 provided with lateral ports 25 and 26. The port 25 is movable into and out of communication with a port- 27 formed in thehead block, which port opens into branch passageways 28 that lead to passageways 29 formed longitudinally in the walls of the cylinder member 9 and conducting motive fluid to the drilling engine. It is believed to be unnecessary to describe in detail the means utilized for distributing this motive duid to the drilling` engine to cause reciprocation of the hammer piston 10, in asumch as this constitutes the subjectmatter of a co-pending application, Serial No. 139,140, filed December 7, 1916, and furthermore dierent types of drilling engines may be employed in connection with the invention.

The port 26 in the throttle valve 22 is movable into and out of communication with a passageway 30 formed in the head block, and as shown in Fig. 4, said passageway opens into the fluid operated feeding means 1.6 17 to deliver fluid thereto for actuating the same.

For the purpose of supplying cleansing fluid to the bore 15 of the drill bit 14:, a tube 31 is employed that extends longitudinally through the hammer piston 10 and tappet 11 into the rear end of the bore of said drill bit. This tube has its rear end located in the head block 18, and said end is externally and internally contracted, producing a contracted bore 32 and an external recess 33. rlihe rear terminal of the tube is 110 greater the tube, after which it is closed, the washer thus being loose upon the contracted end, and in its final position being abutted against the rear shoulder formed by the contraction. Surrounding the contracted portion of the tube in advance of the washer, is a packing gasket 36 of suitable material, and bearing against the rear side of said washer,

is a retaining plug 37 that is threaded into Vthe socket 21. This plug serves to compress the packing gasket 3G tightly around the tube.

The plug 37 is provided with a central bore 38 constituting a liquid receiving chamber, and communicating with this bore are lateral ports 39 which open into an external groove 40 formed in. the periphery of the plug. The groove in turn is in communication with a passageway 41 leading from a nipple 42, to which may be connected a water conducting conduit of any desired character. It will thus be seen that water introduced through the nipple 42 will pass readily into the chamber 38, and thus gain access to the rear or inlet end of the tube 31.

Mounted in the rear end of the bore 38 of the plug 37 is a gaseous fluid directing nozzle 43 that extends across the chamber 38 in spaced relation to the walls thereof and terminates directly adjacent to the inlet end of the tube 31. lIhe nozzle 43 is held in place by a plug 44 threaded into the rear end of the plug 37 and bearing against the nozzle, and the plug 44 has a passageway 45 therethrough that is in communication with the feeding means and also in communication with the bore of the nozzle 43. The plug 45 has an internal valve seat 46, coperating with which is a forwardly opening ball valve 4T normally held seated by a spring 48.

Briefly described, the operation of the apparatus is as follows: Assuming that the drilling apparatus is in operation, .the tlirottle valve 22 will, of couise, be opened, so that fluid will flow through the drilling engine and also through the passageway 30 to the feeding means. The pressure in said feeding means will overcome the resistance of the spring 48, and the valve 47 will thus be unseated, so that the gaseous fluid will flow from the feeding means through the nozzle 43 and be directed thereby into Vthe contracted bore 32 in the inlet end of the tube 3l. Atthe same time, liquid will be delivered into the chamber 38 and therefore the nozzle will act as an injector which will tages of the herein described invention will be apparent to those skilled inthe art, without further description, and it will be understood that various changes in the size, shape, proportion andminor details of construction may be resorted towithout depart- -ing from the spirit or sacrificing Vany of the advantages of the invention.

Having thus fully described myv invention,

`what I claim Vas new and desire to secure bv Letters Patent, is 5- 1. In apparatus of the character set forth,

the combination with a drilling engine com- 1 prising a cylinder member anda piston op.-

'erating therein, of means for conducting cleansing fluid axially through the piston to a drill bit operated on thereby, fluidV operated feedingmeans for the drillingengine, l

means for supplying actuating fluid'thereto, and means interposed between the feeding means and engine and having a passage passing axially .from the former to the latter for deliveringcleansing fluid from the feedi ing means to thecleansing fluid conducting means. i

2. In apparatus of the character-'set forth, the combination with a drilling engine comprising a cylinder member and a.. piston operating` therein, of fluid actuated l feeding means for the drilling engine, a head-block interposed between .the drilling engine and feeding means and having a socket opening axially therethrough, a cleansing fluid ,conducting tube having- Vits rear end in the socket, said tubeproJecting forwardlyinto the engine, and retaining means for the tube extending into the socket and having a passageway therethrough for delivering cleansing fluid 'from the feeding meansto the tube.

3. In apparatus of the character set forth, the combination with adrilling` engine comprising a .cylinder member and a piston operating therein, of means for conducting cleansing fluid axially through the piston to a drill bitoperatedgon thereby, fluid operated feeding means for the drilling engine, means for,l supplying actuating fluid I thereto, means interposed between the feeding means'and engine and having a passage passing axially from :the former to ,the `latter for delivering cleansing vfluid from the feeding means .to the cleansing fluid conducting means, means for deliverincr a liquid cleansing agent to the conducting means, and means for preventing the passage of said liquid cleansing agent backwardly through the axial passageway to the feeding means.

4. In apparatus of the character set forth, the combination with a drilling engine comprising a cylinder member and a piston operating` therein, of liuid actuated feeding means for the drilling engine, a head block interposed between the drilling engine and feeding means and having a socket opening axially therethrough, a cleansing fluid conducting tube having its rear end in the socket, said tube projecting forwardly into the engine, retaining means for the tube eX- tending into the socket and having a passageway therethrough for delivering cleansing fluid from the feeding means to the tube, means for supplying liquid to the tube, and means in the passageway of the retaining means for preventing the back flow of liquid to the feeding means.

5. In apparatus ofthe character set forth, the combination with a drilling engine, comprising a cylinder member and a piston operating therein, of fluid actuated feeding means for the engine, a head block interposed between the feeding means and e11- gine and having an axial socket therethrough, a cleansing fluid conducting tube having its rear end located in the socket and extending forwardly through the piston, a plug threaded rearwardly into said socket for retaining the tube in place, means opening laterally through the plug for conducting a liquid cleansing agent to the tube, a nozzle mounted in the plug and delivering into the tube, retaining means for the nozzle having a passageway therethrough communicating with the feeding means, and a check valve in said passageway.

6. In apparatus of the character set forth,

the combination with a drilling engine, of a Genies of this patent may be obtained for five cents each, by addressing the Commissioner cleansing fluid conducting tube located` therein and having an externally recessed inlet end, a washer fitted in said recessed end, and means engaging the washer for securing the tube in place.

7. In apparatus of the character set forth, the combination with a drilling engine, of a cleansing fluid conducting tube located therein and having an externally recessed inlet end, a washer fitted in said recessed end, a packing gasket bearing against one side of the washer, and a retaining nut bearing against the opposite side.

8. In apparatus of the character set forth, the combination with a drilling engine, of a fluid conducting tube therein having its bore contracted at its intake end, means for supplying Huid to said end, and a nozzle for delivering fluid into said contracted intake end.

9. In apparatus of the character set forth, the combination with a drilling engine, of a fiuid conducting tube therein having its exterior and interior contracted at its intake end, securing` means engaged with the exterior contracted portion of the tube, and means for delivering Huid through said contracted interior.

10. In apparatus of the character set forth, the combination with a drilling engine having a back head provided with a socket, of a fluid conducting tube havino an externally and internally contracted enc located in the socket, a split washer on the externally contracted portion, securing means for the tube located inthe socket and permitting the flow of liquid to the tube, and a fluid directing nozzle extending toward the tube and delivering to the internally contracted portion thereof.

In testimony whereof, I athx my signature in the presence of two witnesses.

XVILLIAM A. SMITH. [Le] litnesses:

L. N. RUDOLF,

R. G. DAVIS.

of Patents,

Washington, 1D. C. 

